Multiple Choice
In a standard DNA extraction protocol, what is the primary purpose of adding cold alcohol (ethanol or isopropanol) to the aqueous lysate?
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18. Molecular Genetic Tools
Methods for Analyzing DNA
Struggling with Genetics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In agarose gel electrophoresis, how are DNA fragments primarily separated?
A
By nucleotide sequence, with AT-rich fragments migrating farther than GC-rich fragments
B
By base composition only, with GC-rich fragments migrating farther due to stronger hydrogen bonding
C
By double-stranded versus single-stranded structure only, with single-stranded DNA always migrating farther regardless of length
D
By fragment size, with smaller DNA fragments migrating farther toward the positive electrode
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